I’ve also attached a picture of the current colours for reference. We intend to re do the garden as a cottage style but just looking for colour ideas at the moment!

Personally I would go a lighter grey than monument and leave the posts and garage a light colour to contrast given the grey driveway. Wallaby or basalt maybe.

I assume the cabinets are laminate though -- it would be difficult to repaint them , PLUS a decent amount of colour will take the focus off them . The walls seem to have a blue tinge to them -- to me ,that adds to the colder , austere look . If I was going to repaint anything , I'd actually opt to do the walls in a warmer English Cream , or even a slight Apricot tinge would be more my taste . And then , the right hand wall in your 'new'pic 1 ( I think it heads to the rest of the house ? Theres a door there ) I would wallpaper in a textured paper , again with apricot tones ,maybe something like relatively simple apricot and cream diagonals 12-15mm wide on a woven textured paper ? ) . And 'double down'with the splashback tiles on the 'front' of the island . So that whole room would be English Cream or maybe a slight apricot tinge , instead of the slight steel blue tinge , with the warmer brown tiles , the pretty neutral floor , the slight coffee cabinets -- and then orange appliances and stools and pendent lights possibly . Obviously , you'd then need to go warmer tones for your dining furniture -- wooden frames , or black gloss and dark glass table , and creams , apricots , orange upholstery ? Mind you , once your present furniture is added , that may be enough ? It looks coldish and too neutral now IMO , but nice furniture will divert most of that attention .

I would look for a sectional sofa, add a bit of drama with a bold rug and cushions, a sectional sofa always looks fabulous as you can pair it with feature chairs, side and coffee tables for a modern look. Nice house.